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Soybean peroxidase-catalyzed removal of phenylenediamines and benzenediols from water

Paper ID Volume ID Publish Year Pages File Format Full-Text
17684 42689 2009 8 PDF Available
Title
Soybean peroxidase-catalyzed removal of phenylenediamines and benzenediols from water
Abstract

Crude soybean peroxidase (SBP), isolated from soybean seed coats (hulls), catalyzes the oxidative polymerization of hazardous aqueous phenylenediamines and benzenediols in the presence of hydrogen peroxide. Experiments were conducted to investigate the optimum operating conditions including pH, hydrogen peroxide-to-substrate concentration ratio and the minimum SBP concentration required to achieve at least 95% conversion of these pollutants in synthetic wastewaters. The substrate conversion and hydrogen peroxide consumption were monitored over the period of the reactions. Polyethylene glycol (PEG) was ineffective as an additive in enhancing the conversion efficiency. The enzymatically generated polymeric products from phenylenediamines could be removed with the aid of a surfactant, sodium dodecyl sulfate (SDS), whereas the polyvalent metal cation salt, aluminum sulfate (alum), was able to remove the products from benzenediols, except hydroquinone. Enzyme-catalyzed polymerization with SBP and subsequent removal of the polymeric products generated can provide an alternative means to the conventional methods for treating many aromatic wastewater pollutants, including the title compounds.

Keywords
Soybean peroxidase; Phenylenediamines; Catechol; Resorcinol; Hydroquinone; Sodium dodecyl sulfate; Aluminum sulfate; Wastewater; Hazardous waste
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Soybean peroxidase-catalyzed removal of phenylenediamines and benzenediols from water
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 45, Issue 4, 7 October 2009, Pages 253–260
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us